Finding the Fourth Proportional to 1,081.74, 1,491.98 and 728.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.74 : 1,491.98 = 728.04 : x
2. Step 2: Convert to fraction form
   1,081.74/1,491.98 = 728.04/x
3. Step 3: Cross multiply
   1,081.74x = 1,491.98 × 728.04
4. Step 4: Simplify right side
   1,081.74x = 1,086,217.48
5. Step 5: Solve for x
   x = 1,086,217.48/1,081.74
6. Step 6: Final answer
   x = 1,004.14